[regexp] implement case-insensitive unicode regexps.

src/regexp/regexp-macro-assembler-tracer.cc

Index: src/regexp/regexp-macro-assembler-tracer.cc
diff --git a/src/regexp/regexp-macro-assembler-tracer.cc b/src/regexp/regexp-macro-assembler-tracer.cc
index 5301ead69bdf02af8abc80639c10d8f3f87cbbed..ec86526033831807f9e495ace269be7fd27e3652 100644
--- a/src/regexp/regexp-macro-assembler-tracer.cc
+++ b/src/regexp/regexp-macro-assembler-tracer.cc
@@ -360,11 +360,11 @@ void RegExpMacroAssemblerTracer::CheckNotBackReference(int start_reg,
 
 
 void RegExpMacroAssemblerTracer::CheckNotBackReferenceIgnoreCase(
-    int start_reg, bool read_backward, Label* on_no_match) {
-  PrintF(" CheckNotBackReferenceIgnoreCase(register=%d, %s, label[%08x]);\n",
+    int start_reg, bool read_backward, bool unicode, Label* on_no_match) {
+  PrintF(" CheckNotBackReferenceIgnoreCase(register=%d, %s %s, label[%08x]);\n",
          start_reg, read_backward ? "backward" : "forward",
-         LabelToInt(on_no_match));
-  assembler_->CheckNotBackReferenceIgnoreCase(start_reg, read_backward,
+         unicode ? "unicode" : "non-unicode", LabelToInt(on_no_match));
+  assembler_->CheckNotBackReferenceIgnoreCase(start_reg, read_backward, unicode,
                                               on_no_match);
 }